Rotary engine.



. TMAN.

ROT Y ENGINE. AAAAAAAAAAAAAAAAAAA 25', 1910.

976,91 3. Patented Nov. 29, 1910.

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Attorneys J. PUTMAN.

ROTARY, ENGINE.

APPLICATION FILED MAY 25, 1.910.

r.. .s w y .oww m A VT Z D... J J f7 f JOHN PUTMAN, OF PARIS, ILLINOIS.

ROTARY ENGINE.

Specification of Letters Patent.

Patented Nov. 29, 1910.

Application filed May 25, 1910. Serial No. 563,346.

In order that the invention may be fully understood, reference is had to the accompanying drawings forming a part of this specification, in which drawings- Figure 1 is a vertical section of the engine. Figs. 2 and 3 are horizontal sections on the lines 2 2 and 3 3, respectively, of Fig. 1.

Referring more particularly to the drawings, 5 denotes a cylinder which is supported in horizontal position on a suitable base 6, said cylinder being closed at its ends by heads 7 and 8, respectively. In the cylinder is mounted a rotor comprising a drum 9 carrying diametrically opposite, radially sliding blades 10. On the inside of the drum 9 is located a cam 11 having an opening through which the engine shaft 12 passes, said shaft being free to turn in the opening. The cam is a cylindrical member arranged eccentrically with respect to the shaft. The blades 10 are slidably mounted in radial openings made in the drum, and they project into the latter, as well as into the interior of the cylinder, the ends of the blades being in contact with the cylinder wall and the periphery of the cani, respectively. The cylinder wall is concentric with respect to the periphery of the cam, and the drum is concentric with respect to the shaft, by rea son of which the ends of the blades are held in sliding contact with the cylinder wall and the periphery of the cam when the drum rotates. rIhe ends of the blades are fitted with packing blocks 13 to provide a steam tight joint. The internal diameter of the cylinder 5 is greater than the external diameter of the drum 9, and said drum is in contact with the cylinder wall at one point, thus forming a crescent-shaped channel 14 in the cylinder across which the outer ends of the blades 10 extend.

On one side of the point of contact between the cylinder wall and the drum, inlet ports 15 open into the channel 14:, one of said ports being located slightly in advance of the other. On the other side of the point of contact betweenvthe cylinder wall and the drum, exhaust ports 16 lead from the channel 14, oneof said ports also being located in advance-of the other. One of the ports 15 is located quite close to the point of contact between the cylinder wall and the drum so that the steam or other motive fluid can get behind the blade as soon as it passes this point. The slight inequality of pressure against this side of the blade due to the difference of its area on opposite sides, is negligible in view of the larger area of the blade which has already passed the inlet port, and a jainst which the full pressure is working. ne of the exhaust ports 16 also extends in close proximity to the point ot' contact between the cylinder wall and the drum, so that steam can exhaust until the blades come quite close to this point.

The steam supply to and the exhaust from the interiorvofthe drum 9 is by the way of ducts 17 and 18 respectively, in the cam 11, said ducts extending from one end thereof, and parallel to its longitudinal axis. From the duct 17 a plurality of ports 19 open through the side of the cam into the interior of the drum, and a similar series of ports 2O open from the duct 18 into the interior of the drum. The periphery of the cam is in Contact with the interior surface of the drum at one point, and the ports 19 and 20 are located on opposite sides of this point. Steam or other fluid under pressure enters the interior of the drum through the ports 19, and is expended against that end of the blades extending into the drum. The exhaust is through the ports 2O into the duct 18.

The head 8 is formed with an opening 21 into which the cam 11 extends, and to the outer face of the head is bolted or otherwise fastened a plate 22. This plate comes against the outer end of the cam, and the latter is fastened to the plate by bolts or other suitable means 23, whereby the cam is held stationary. The shaft 12 rotates in the cam.

One end of the drum 9 is open, and this end is closed by the head 8, a packing ring 24C being interposed therebetween. The other end of the drum is closed by a head 25 which is in contact with the interior surthrough which the Shaftl2 passes,said shaft being made fast -to the drum bylmeans of a key` or other suitable-means 30, so that the l Vshaft Will rotate .with the drum. In the head 7 is an opening to receive thehub -ex- Y tension 29 of the drum, and. to the outside of this khead is bolted or otherwise secured a plate 31 Which lits against the outer end of the hub extension.` 'This plate is'formed with a stuiiing-box 32'through which the shaft l2extends, said :Stuffing box being provided Witha-fsuitablegland 33. One end of the cam Vll is in contact with lthe'closed end or'liead 25Y of the vdrum 9, and between said parts' is interposed a packing ringVIV 34.

What is claimed is:

1 .VV In a rotary engine, a cylinder having inlet ,and exhaust ports, la .drum in the cylinder, a 'shaftvcarryingsaid drum, a stationary camy in the drum through which cam the shaft loosely passes, r,said cam havingrlongitudinal inlet and exhaust ports opening through the sidesof the ,cam into the drum, and radially sliding Yblades carried by the drum, and extendinginto the cylinder and `the interior of the drum, the ends of the blades being in fslidingcontact with the cylinder vvall and the periphery of the cam, respectively.

2, A rotary engine having a :stationary casing, a shaft eccentric to theinterior of thecalsing7 a xed. abutment eccentric to the shaft and rconcentric to the interior of the casing, adrum concentric to the shaft, the exterior of the ldrum touching the'` inner Wall `of the casing-at one point and the inner Wall the shaft, an exhaust port in the casing, i

and an exhaust port in the abutment, the exhaust port of the abutment being at an opposite point With relation to the center of the shaft from the exhaust port in the casing.

3. A rotary engine having a casing, a shaft eccentric to the interior of the casing, an abutment fixed With relation to the casing and eccentric to the shaft, said abutment being concentric to the interior of the casing, a drum concentric to the shaft and being movable relatively to the abutment and casing, the exterior of the drum touching the inner Wall of the casing at one point and the inner Wall of the drum touching the exterior of the abutment at a pointropposite the point of contact of the drum with the casing, blades carried by the drum and extending radially from the exterior of the abutment to the interior of the casing, inlet and exhaust ports through the abutment-on opposite sides of the point of contact of said abutment with said drum, and inlet and lexhaust ports through the casing on opposite sides of the point of contact of the drum Wit-h Vsaid casing, the exhaust port in the abutment being on one side of the shaft, and the exhaust port of the casing being on the opposite side of the shaft, the inlet of the l abutment being on one side of the shaft and the inlet of the casing being on the opposite side of the shaft.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two Witnesses.

JOHN PU'IMAN. Witnesses:

CHAS. FLICKNER, FRANK C. FISHBACK. 

